Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac hoc da snippets" » "cach hoc da snippets", "cac hop da snippets", "bac hoc da snippets", "cac hoc dan snippets", "cac hoc dai snippets", "cac hoc dat snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cac hoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac hoc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac hoc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac hoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.